全局访问根 Angular 2 注入器实例 [英] Accessing root Angular 2 injector instance globally
问题描述
如何全局访问根 Angular 2 注入器的实例(例如,从浏览器控制台).
How to access an instance of root Angular 2 injector globally (say, from browser console).
在 Angular 1 中它是 angular.element(document).injector()
.
In Angular 1 it was angular.element(document).injector()
.
在测试和探索过程中很有用,使用浏览器控制台获取注入器然后访问不同组件、指令、服务等的实例.
It can be useful during testing and exploration, to use browser console to get injector to then access instances of different components, directives, services etc.
推荐答案
在引导应用程序后,您必须将其设置为服务:
You must set it into a service after bootstrapping the application:
export var applicationInjector: Injector;
bootstrap([AppComponent]).then((componentRef: ComponentRef) => {
applicationInjector = componentRef.injector;
});
然后您可以将其导入应用程序的其他部分:
Then you can import it into other parts of your application:
import {applicationInjector} from './bootstrap';
查看此问题了解更多详情:
See this question for more details:
编辑
您可以将 ApplicationRef
注入到组件中,并通过它访问根注入器:
You can inject the ApplicationRef
into components and have access to the root injector through it:
@Component({
(...)
})
export class SomeComponent {
constructor(private app:ApplicationRef) {
var rootInjector = app.injector;
}
}
你需要利用依赖注入来获得它.
You need to leverage dependency injection to get it.
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